Add Yahoo as a preferred source to see more of our stories on Google. Robert Hoff was amazed the first time he saw a coin press machine in action in the 1970s. Hoff was in his twenties when a person ...

Grip the handle and turn the crank. Watch the roller turn. Wait for that clink, reach into the little door. Turn over the still-warm, copper-colored oval in your palm. Smile. It’s a pretty penny.

A wheel cranks on the machine at the Independence Visitor Center in Philadelphia, slowing with every turn until: CLINK! A reward drops out the bottom waiting to be collected. It’s a familiar, ...